1 /* 2 * UFC-crypt: ultra fast crypt(3) implementation 3 * 4 * Copyright (C) 1991-2022 Free Software Foundation, Inc. 5 * 6 * The GNU C Library is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * The GNU C Library is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with the GNU C Library; if not, see 18 * <https://www.gnu.org/licenses/>. 19 * 20 * @(#)crypt.h 1.5 12/20/96 21 * 22 */ 23 24 #ifndef _CRYPT_H 25 #define _CRYPT_H 1 26 27 #include <features.h> 28 29 __BEGIN_DECLS 30 31 /* One-way hash PHRASE, returning a string suitable for storage in the 32 user database. SALT selects the one-way function to use, and 33 ensures that no two users' hashes are the same, even if they use 34 the same passphrase. The return value points to static storage 35 which will be overwritten by the next call to crypt. */ 36 extern char *crypt (const char *__phrase, const char *__salt) 37 __THROW __nonnull ((1, 2)); 38 39 #ifdef __USE_GNU 40 41 /* This structure provides scratch and output buffers for 'crypt_r'. 42 Its contents should not be accessed directly. */ 43 struct crypt_data 44 { 45 char keysched[16 * 8]; 46 char sb0[32768]; 47 char sb1[32768]; 48 char sb2[32768]; 49 char sb3[32768]; 50 /* end-of-aligment-critical-data */ 51 char crypt_3_buf[14]; 52 char current_salt[2]; 53 long int current_saltbits; 54 int direction, initialized; 55 }; 56 57 /* Thread-safe version of 'crypt'. 58 DATA must point to a 'struct crypt_data' allocated by the caller. 59 Before the first call to 'crypt_r' with a new 'struct crypt_data', 60 that object must be initialized to all zeroes. The pointer 61 returned, if not NULL, will point within DATA. (It will still be 62 overwritten by the next call to 'crypt_r' with the same DATA.) */ 63 extern char *crypt_r (const char *__phrase, const char *__salt, 64 struct crypt_data * __restrict __data) 65 __THROW __nonnull ((1, 2, 3)); 66 #endif 67 68 __END_DECLS 69 70 #endif /* crypt.h */ 71